Method and apparatus deflecting and drawing tow



J. N. GRAY April 30, 1968 METHOD AND APPARATUS DEFLECTING AND DRAWINGTOW Filed July 13, 1964 3 Sheets-Sheet 1 April 0, 1968 J. N. GRAY3,380,131

METHOD AND APPARATUS DEFLEC-TING AND DRAWING TOW Filed July 13, 1964 5Sheets-Sheet 2 Ti Z3.

April 30, 1968 J. N. GRAY 3,380,131

METHOD AND APPARATUS DEFLECTING AND DRAWING TOW Filed July 13, 1964 5Sheets-Sheet 5 4) W n g 1 f United States Patent 3,380,131 METHOD ANDAPPARATUS DEFLECTING AND DRAWING TOW Jack N. Gray, Shelby, N.C.,assignor to Fiber Industries Inc., a corporation of Delaware Filed July13, 1964, Ser. No. 382,328 7 Claims. (Cl. 28--1) ABSTRACT OF THEDISCLOSURE A process and apparatus for the production of drawn tow inwhich a band of tow of drawable continuous filament is fed through adraw zone wherein a deflecting surface contacts the tow band and causesthe filaments to intermingle.

This invention relates to tows of filamentary material and relates moreparticularly to the production of crimped tows of polyester filaments.

Man-made fibers which are to be cut into staple fiber length are oftensupplied as tows which are bundles of generally parallel continuousfilaments, each such bundle containing a large number of such filaments,generally well over 500, e.g. 6,000 to 500,000. In one process for themanufacture of tows, suitable for use in making staple fibers, a numberof sub-tows, each containing only a fraction of the filaments desired inthe main tow, are first fed side-by-side to a draw frame where they arestretched, in a manner well known to the art (as dis cussed for examplein Man-Made Textile Encyclopedia edited by J. J. Press pub. 1959 byTextile Book Publishers, Inc., pages 75 and 76), to develop the desiredphysical properties (e.g. high tenacity and stiffness); the resultingdrawn tow is then fed to a crimping device, preferably a stuifercrimper, after which the crimp is set, as by feeding the band of crimpedtow, in untensioned condition, onto a belt which transports itcontinuously through an oven maintained at a temperature sufficientlyhigh to set the crimp permanently but not high enough to damage or meltthe filaments. The crimped tow may then be cut into staple, baled andthen opened and spun into sliver and then into yarn, as is now mostcommonly done, or it may be fed to a device such as a Turbo Stapler(U.S. 2,748,426) or a Pacific Converter (US. 2,438,- 469) for directconversion into a sliver of discontinuous filaments.

It isan object of this invention to provide a crimped tow whichprocesses especially well during its direct conversion to sliver.

Other objects of this invention will be apparent from the followingdetailed description and claims. In this description and claims allproportions are by weight unless otherwise indicated.

In accordance with one aspect of this invention, a plurality of undrawnsub-tows are fed to a drawing zone and, while in the form of a band insaid zone and under the drawing tension, are passed over a deflectingsurface inclined to the direct draw path of said band so that thedeflection from said direct draw path varies along the width of saidband. The use of this process makes it possible to produce novel tows inwhich the degree of intermingling of the filaments is controlled and isrelatively uniform across the width of the tow. Thus there can beproduced tows with a limited degree of intermingling which performespecially well during direct conversion on the Turbo Stapler, producinga sliver which is uniform and has very few neps or entanglements whichmust be combed out. Such a tow can also be readily opened andderegistered on a patterned roll device of the type described inCanadian Patent No. 674,101 and can then be spread to form a wideuniform band by pass- 3,380,131 Patented Apr. 30, 1968 ice ing itthrough an air spreader, or series of air spreaders, in which a band ofopened tow is passed through a confined zone while air is blown againstone or both of the flat sides of the band.

In contrast, when the blending of the subtows is accomplished by layingone subtow on top of another, the resulting tow (after crimping)appears, when processed on the aforesaid patterned roll device, to hemade up of distinguishable sublayers and the degree of interminglingacross the width of the tow is so great that the processed tow is notsignificantly opened by the patterned roll device and is not spreadableon the air spreader.

In addition, the tows of this invention process exceptionally well onthe Pacific Converter, particularly after they have been opened with thethreaded patterned roll device previously mentioned. In fact, these towswhen so opened produce excellent slivers and yarns even when the PacificConverter is set to cut the filaments to very short lengths.

One aspect of this invention is illustrated in the drawing in which FIG.1 is a diagrammatic side view of an embodiment of the process for makinga package of crimped tow,

FIG. 2 is a plan view of the tow band in the drawing zone,

FIG. 3 is a view showing the cross-section of the tow band as it passesover the deflecting surfaces,

FIG. 4 is a plan view, of a different embodiment, showing two tow bandsin the drawing zone,

FIG. 5 is a schematic view of a tow opening and spreading procedure.

As shown in FIG. 1 of the drawing, a plurality of undrawn subtows 1 aretaken from loose packages, each subtow being passed through its ownaperture in a multiapertured guideboard 2 and then to a series of smoothparallel stationary tension bars 3, each of which is preferably acircular cylinder. In passing around the second tension bar 3b the towdips into an aqueous bath 4, preferably a very dilute solution ordispersion (e.g. of about 1% concentration) of a finishing agent, suchas a lubricating and antistatic agent, in water. The wet tow passes fromthe tension bars 3 to a set of driven feed rolls 6 and then through aheated draw zone 7 to a set of driven draw rolls 8, 8a, 8b, all of thedraw rolls being driven at a peripheral speed appreciably greater thanthat of the feed rolls 6. Each successive draw roll is preferably ofslightly larger diameter (e.g. 0.05% larger) than the draw rollpreviously engaged by the tow so that although the draw rolls are alldriven at the same rotational speed, the peripheral speed of theserolls, and the tow speed, increase as the tow moves over the draw rolls;the peripheral speeds of the feed rolls are similarly increased alongthe path of the tow.

Although the subtows, as fed to the first tension bar, are spaced alongthe length of said bar, and only some of the filaments of each of thesemultifilament subtows are in direct contact with said bar, the tensionon the subtows engenders forces normal to the surfaces of the tensionbars and feed rolls, which forces urge all the filaments of said subtowstowards said surfaces, thus spreading the subtows until their outerfilaments are in contact or even slightly overlapped. The tow leavingthe feed rolls thus has the appearance of a unitary and.

In the embodiment shown in FIGS. 1 and 3 of the drawing, the deflectingsurface which engages the band of tow between the feed rolls and thedraw rolls is that of a double frustoconical roll 9 mounted for freerotation on an axis generally transverse to the path of the tow,preferably on an axis lying horizontally in a vertical planeperpendicular to the direction of movement of the tow. The top of thecrotch 11 of the deflector roll 9 is slightly above the direct draw path(which direct path, in the embodiment shown in the drawing, runsstraight from the bottom of the last feed roll 6b to the bottom of thefirst draw roll 8) while the upper shoulders 12 and 13 of the deflectorroll 9 are obviously still further displaced from said direct path; Thedeflector roll 9 is so mounted that its crotch 1:1 is in the verticalplane of the center of the moving tow band. It will be seen that,because of the tenion on the tow band and the position of the deflectorroll 9 in relation to the tow band, those filaments which are spacedfrom the surface of said roll and which are thereby not restrained bycontact with said surface will tend to move relative to filaments atsaid surface as the tow passes over the deflector roll, as shown by thearrows in FIG. 2. By adjusting the position of the 'axis of thedeflector roll 9 upwards or downwards, the tendency of the filaments tointermingle can be increased or decreased, respectively, as desired; inthis manner the degree of cohesiveness of the resulting crimped drawntow can be controlled, as desired. The degree of cohesiveness can alsobe increased or decreased by using deflecting surfaces of greater orlesser inclination to the direct tow path. As shown in the drawing theincluded angle at the crotch 11 is about 60; suitably this angle may bein the range of about 30-150, preferably within the range of 45-90.Despite the fact that the filaments at the outer edges of the tow bandare drawn through a longer path, by virtue of their passage over thedeflector roll shoulders, than those at the center of the band, it isfound that the filaments are relatively uniformly drawn throughout theband.

The tow passes from the draw rolls to 'a dancer roll arrangement 16 andover a guide 17 to the nip of a pair of positively driven delivery rolls18 to a stuffer crimper 19 comprising a main body 21 which forms aV-shaped stufling chamber, rectangular in horizontal cross-section,whose width is about the same as that of the tow band and whose depth(perpendicular to said width) is about 1% inch at the top, taperingdownwardly over its length of about inches. The outlet of the stuflingchamber is resiliently closed by a pivoted flapper 22, biased to closedposition in a manner well known to the art. The crimped band of towleaving the stuffing chamber, still moist at this stage, is passedthrough a distributor 23 which may be of the usual type comprising apivoted tube, generally of sufficient width to accommodate said bandwithout folding, which is swung back and forth about its pivot 24 by anysuitable mechanism to deposit the tow in a sinuous path across the widthof a driven endless belt 26 which carries the tow, resting thereon insubstantially tensionless condition, through an oven 27 which isdesirably maintained at a temperature sufliciently high to set the crimpin the filaments of the tow, e.g. a temperature in the range of about 85to 180 C. After passing through the oven the belt carries the tow somedistance through ambientair, whereafter the tow is distributed (as bydis tributor 28) back and forth and side-to-side in a carton 29 and isthen compressed in saidcarton.

The preferred tow of this invention is a band of substantially parallelcrimped drawn glycol terephthalate polyester continuous filaments oftenacity greater than 2 grams per denier, the crimps of adjacentfilaments being in registry so that there are ridges, extending acrossthe tow, formed from the crests and valleys of the crimps of adjacentfilaments, said filaments having portions crossing over adjacentfilaments at small angles of less than 1 to the general direction ofsaid filaments, the filament density 'and degree of such crossing overbeing substantially uniform across the width of tow band, said band,after the crimps have been deregistered without further intermingling ofthe filaments, being readily spreadable laterally by a confined airstream to form a uniform web of a width at least six times the width ofsaid band. Preferably the band is cohesive and nondelaminable throughoutits thickness; i.e. it does not readily separate into layers withoutsubstantial filament breakage.

The following examples are given to illustrate the practice of thisinvention further.

Example I 7 undrawn subtows, each containing 3,530 filaments ofpolyethylene terephthalate of 23 denier per filament, were fed withtheir centerlines spaced /2 inch apart to the tension bars of anapparatus as shown in FIGS. 1 and 2. In the drawing zone the tow bandwas subjected to an atmosphere of a hot fluid, preferably steam. Thedraw ratio was about 4.6:1. The tow band leaving the last feed roll was5 inches wide. The filaments necked down, under the drawing tension, ata point within the heated draw zone near the last feed roll 6b. Thedeflector roll, whose surface was of smooth metal, had a crotch 1 /2inches in diameter and shoulders which sloped toward the crotch at anangle of 60 to the axis of said roll, forming a 60 notch. The horizontaldirect draw path joining the bottom of the last feed roll and the bottomof the first draw roll was 8 feet long, and the uppermost part of thecrotch of the delivery roll was located inch above this direct path, 16inches forward of the axis of the first draw roll. The drawn tow, at itszone of contact with the deflector roll, was inch wide, measuredhorizontally; at the surface of the first draw roll it formed a band 1inch wide, so that the total denier per inch of width was 128,000. Atthe deflector roll the outer edges of the tow band were about 3 inchthick, measured perpendicular to the surface of the sloping shoulder,this thickness increased gradually toward the center of the band; abovethe crotch of the deflector roll the tow band was /3 inch thick,measured perpendicular tothe axis of the roll. In the stufl'er crimperthe tow was subjected to direct steam (supplied at 20 p.s.i.g.) and wasgiven a fine crimp of 12 crimps per inch superimposed on a coarse crimp(of much larger amplitude) of about 3 crimps per inch. The crimp was setat a temperature of 150 C. for 20 minutes. The set tow band, whencooled, had a degree of crimp of about 60%; the percent crimp, as usedherein, being where Lc is the length of any predetermined portion of thetow and Ls is the average length of the filaments of said predeterminedportion when under a tension just suflicient to remove the crimp. Itstenacity was 4.5 grams per denier.

The set tow band could be passed directly from the oven, after cooling,through a threaded roll opener to produce a uniform deregistered towband, 8 inches wide, which could be spread easily to a width of morethan 50 inches by passing it, indirectly after leaving the last of thethreaded rolls, through two stages of air spreading. In each stage therewas an air spreader made up of a pair of parallel horizontal platesbetween which the tow band passed, the plates being spaced apartslightly more than the thickness of the tow band, one of the platesbeing slitted and forming a wall of a plenum chamber which extended forthe full area of the slitted plate and which was connected to a sourceof air under pressure so that air was blown through the slits in thatplate in a substantially uniform manner across the whole width of themoving tow band. Between successive air spreaders the tow passed throughtight nips of rolls driven at such a speed that the tow was pulled,under slight tension, through the spreaders. Even though the resultantweb was extremely light, it was sufficiently cohesive that it would notsplit when a stream of air was blown against it by a fan, but insteadballooned out like a sail before the wind.

The tow opening and spreading procedure referred to in the above exampleutilizes the apparatus shown in FIG. 5, in the following manner: The towband is drawn from a bale 32 through a banding jet 33 comprising acylinder 34, having a slit running lengthwise of the cylinder at itshighest point, and a curved baflle member 36 parallel to, and spacedinch from, the adjacent surface of said cylinder, so that the tow band31 passes between said baflle member 36 and said cylinder 34. Air underpressure is supplied to the interior of the cylinder 34 and emerges as astream, from the slit of said cylinder, against the tow band and thebaffle member 36. The tow band 31, now about 8 inches wide, passesaround stationary tensioning bars 37, 38 and then into the nip between apair of rolls 39, 41, both rubber-surfaced, driven at a peripheral speedof 60 feet per minute and then horizontally to the nip between arubber-surfaced roll 42 and a threaded steel roll 43, driven at aperipheral speed of 102 feet per minute, said threaded roll havinghelical threads of 14 turns per inch cut about inch deep into its outersurface. The tow entering the nip between rolls 42, 43 is still about 8inches wide. From these rolls it passes still in the same horizontalplane to an air spreader having a tow-receiving slot 46 which is 24inches wide and 4 inches long. The tow-receiving slot 46 is defined byan upper wall 47 and a lower wall 48 spaced ,4 inch apart. Below thelower wall 48 is a plenum chamber 49 supplied with air under a constantpressure of 3 p.s.i.g. from a suitable source (not shown) andcommunicating with the tow-receiving slot 46 through air slits 51, each0.007 inch wide at their outlet ends and tapered to said outlets at anincluded angle of 45, said slits being each inches long and so arrangedthat the end of one slit is aligned, in the direction of movement of thetow, with the end of the adjacent slit, so that air is supplied to thetow band across the full 2-inch width of the slot 46. The slits arearranged at small angles (e.g. about 5) to the line perpendicular to thedirection of movement of the tow with the slits on opposite sides of themedian line of the spreader being mirror images.

The tow band diverges uniformly from its 8 inch width at rolls 42, 43 tothe full 24-inch width at the exit of spreader 44, the entrance of whichis located 1 foot from the nip of rolls 42, 43. The tow is pulledthrough the spreader 44 by the action of a pair of rolls 56, 57, makingan S-Wrap around these rolls, that is, passing 180 around steel roll 56then passing through the nip between the rolls and then making another180 wrap around rubber-surfaced roll 57. The tow web keeps its 24-inchwidth during its travel to and around the rolls 56, 57 which are movinga peripheral speed of 61 feet per minute.

From the lower portion of roll 57 the tow then passes to the entrance ofair spreader 58 which is located 3 feet horizontally from, and one footbelow, the entrance of air spreader 58, which is located at the samehorizontal level as the bottom of roll 57. The spreader 58 is of thesame design as spreader 44, except that its tow-receiving slot is 50inches wide, and it is operated under the same air pressure (3 p.s.i.g.)as spreader 44. The towweb spreads uniformly in its horizontal passageto spreader 58, at which it reaches its 50-inch width and then maintainsthe same width during its passage to a pair of rolls 59, 61, driven at aperipheral speed of 59 feet per minute, which serve to pull the webthrough the spreader 58. Roll 59 is a rubber-surfaced roll while roll 61is steel-surfaced; the top of roll 59 is on a level with thetow-receiving slot of spreader 58 and with the bottom of roll 57. Thetow makes an S-wrap about the rolls 59, 61, falling from the roll 61 ina freely hanging shallow catenary 62 onto the horizontal moving surfaceof a wide endless take up belt 63. An idler roll 64, mounted on leverarms 66 pivoted at 67, extends across the full width of the tow web onbelt 63. The path of the belt is 2 feet below the bottom of roll 61while the roll 64 is mounted inches forward (in 6 the direction ofmovement of the belt) of the center of roll 61. The web on belt 63 has awidth of 50 inches.

The bottom rolls of the roll pairs are each positively driven while thetop rolls are spring pressed downward and are rotated by the movement ofthe tow passing through the nip, with no appreciable slippage.

Example II Using the procedure and apparatus set forth in Example Ithere was produced an intermingled drawn polyethylene terephthalate towhaving a total denier of 200,000 and a denier per filament of 1%, acrimp frequency of 15 crimps per inch and a percent crimp of 20%. Inthis example there were used 16 subtows, the draw ratio was 3.4:1, nosteam (or other heat) was supplied during crimping, and the oventemperature was 112 C. After cooling, the tow was continuously laid intoa carton and compressed to form a bale having a density of 20 lbs. percu. ft. Bales of this tow were fed to a Turbo Stapler and thereperformed extremely efliciently, giving a sliver with very low count ofneps or entanglements.

Example III By raising the axis of the deflector roll so that its crotchwas /2 inch above the direct draw path, and keeping all other conditionsthe same as set forth in Example I, the degree of intermingling wasincreased. The cross-section of the tow at the crotch of the deflectorroll was much more compact, being substantially an equilateral triangle,approximately inch on each side. The tow was very cohesive and resistedopening and spreading; it was substantially uniformly intermingledthroughout its thickness and showed no signs of separation intosublayers.

In the embodiment shown in FIG. 4, two spaced tow bands are separatelydeflected on the deflector roll 9 which is, in that embodiment, mountedwith its axis and the upper part of its crotch below the direct drawpath so that the two tow bands do not tend to converge at the crotch.Here the intermingling takes place, as in the embodiment shown in FIG.2, by movement of filaments in a direction towards the crotch, butwithout the intermingling at the crotch which occurs in the embodimentshown in FIG. 2.

It will be understood that the arrangements shown in the drawings areillustrative and may be varied as desired. Thus, the deflector roll maybe placed above the tow so that the tow passing over the deflectingsurface is below the axis of the deflector roll; or the tow path fromfeed roll to draw roll may be generally vertical or inclined, with thedeflector roll placed on either side of that tow path. A plurality ofdeflector surfaces successively engaged by the tow band may be used, andthe inclination of the deflector surfaces may vary across the width ofthe band, e.g. by using surfaces which present a curved, rather thanstraight, line to the tow. In place of a freely rotatable deflector rolla stationary surface over which the tow slides may be employed. Thus,the roll may be stationary or it may be replaced by a V-shaped deflectorbar which presents a similar surface to the tow band. Similarly, inplace of the deflector arrangement shown in FIGS. 2 and 4, a pair ofinclined deflector bars may be used; these may be both inclined in thesame direction or oppositely inclined and both need not, of course, bein the same plane. By suitably increasing the number of deflectorsurfaces, a number of tows may be processed, separately and in parallel,on a single draw frame.

It is advantageous to increase the wear resistance and slip propertiesof the deflector surfaces by a flame-spraying procedure such asdescribed in US. Patent 2,714,563. By the flame-spraying technique, amaterial such as aluminum oxide, chromic oxide, titanium oxide, and thelike is heated in a molten state and sprayed upon the metallic deflectorsurface in the form of fine globules 7 which are thereby bonded to themetallic surface which may be of brass, stainless steel, aluminum, etc.

The invention is particularly suitable for the processing of tows ofpolyethylene terephthalate in which the weight of the drawn tow is aboveabout 40,000 denier per inch of tow width on the first draw roll and thedrawn filament denier is below 25. Advantageously, the filament denieris in the range of about 1 to 25, usually about 1 /2 to 18, preferablyabout 1 /2 to 8, and the number of filaments in the tow is over 1,000,e.g. about 2,500 to 300,- 000. The tow is advantageously given about 3to 80 crimps per inch, preferably about 5 to 20 crimps per inch. Thenumber of subtows used to produce a single tow in the process of thisinvention may be, advantageously, in the range of about 2, to 75 ormore, advantageously 5 to S0.

The inventioin has been described particularly with respect to towswhose filaments are of polyethylene terephthalate. It will be understoodthat it is within the broad scope of the invention to carry it out withother tows, such as those made of other polyesters (eg. the polyestersof terephthalic acid and other 'glycols such as dimethylol cyclohexane),polyamides (such as nylon 6 or nylon 6, 6), polyacrylonitrile andcopolymers thereof, polyolefines such as isotactic polypropylene, etc.These polymers may, if desired, be of the more easily dyeable typecontaining groups, e.g. SO Na or NH; groups, which promote dyeability.

It is to be understood that the foregoing detailed description is givenmerely by way of illustration, and that variations may be made thereinwithout departing from the spirit of this invention.

The embodiments of the invention in which an eX- elusive property orprivilege is claimed are defined as follows:

1. In the process for the production of drawn tow in which a band of towof drawable continuous filaments is continuously fed through a drawingzone from a feed means to a draw means pulling said ban-d at a speedhigher than it is supplied by said feed means to stretch said band toincrease the tenacity of said filaments, the improvement which comprisesdeflecting the moving tow band, in its travel from said feed means tosaid draw means, by deflecting surface contact at an inclination to thedirect path of said band, the deflection from said direct path varyingalong the width of said band to intermingle the filaments of said band.

2. Process as set forth in claim 1 in which said tow is made up offilaments of glycol terephthalate having a melting point above 250 C.,said tow band containing at least 1,000 filaments, the drawn denier ofsaid filaments being in the range of about 1 to 25, the draw ratio beingin the range of about 2.5 :1 to 6:1, the density of the drawn tow bandon said draw roll being at least 40,000 denier per inch, and saidfilaments being in substantially fully drawn condition before saiddeflecting surface con tact.

3. Process as set forth in claim 1 in which the middle portion of theband is deflected less than the edges of said band.

4. In the process for the production of drawn tow in which a band of towof drawable continuous filaments is continuously fed through a drawingzone from a feed roll to a draw roll pulling said band at a speed higherthan it is supplied by said feed roll to stretch said band to increasethe tenacity of said filaments, the improvement which comprisesdeflecting the moving tow band, in its travel from said feed roll tosaid draw roll, by passing the tow band in such travel over a deflectingsurface inclined to the direct path of said tow, said surface being soarranged that the defiection from said direct path varies along thewidth of said band to intermingle the filaments of said band.

5. In the process for the production of drawn tow in which a band of towof drawable continuous filaments is continuously fed through a drawingzone from a feed roll to a draw roll pulling said band at a speed higherthan it is supplied by said feed roll to stretch said band to increasethe tenacity of said filaments, the improvement which comprisesdeflecting the moving tow band, in its travel from said feed roll tosaid draw roll, by passing the tow band in such travel over deflectingsurfaces oppositely inclined to the direct draw path of said tow, saidsurfaces being so inclined that the extent of deflection decreasesprogressively from the edges of said band to the middle thereof.

6. In an apparatus for the production of drawn tow, in which a band oftow of drawable continuous filaments is continuously fed through adrawing zone from a feed means to a draw means pulling said band at aspeed higher than it is supplied by said feed means to stretch said bandand to increase the tenacity of said filaments, the improvement whichcomprises, in combination with said draw means and said feed means,surface deflecting means for engaging and deflecting the tow bandpassing to said draw means under the drawing tension, to intermingle thefilaments of said band said surface deflecting means engaging said bandat an inclination to the direct path of said band and having sloping towengaging sides based from said direct path and an intermediate towengaging portion spaced from said direct path a lesser distance thansaid sides.

7. Apparatus as set forth in claim6 in which said deflecting means is aroll having a central tow engaging crotch.

References Cited UNITED STATES PATENTS 3,124,859 *3/1964 Corbiere et a1.28-713 X 3,145,429 8/1964 Resor 281 X 3,145,947 8/1964 Stanley 28-l XLOUIS K. RIMRODT, Primary Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No.3,380,131 April 30, 1968 Jack N. Gray It is certified that error appearsin the above identified patent and that said Letters Patent are herebycorrected as shown below:

Column 4, line 57, "indirectly" should read directly Column 5, line 36,"2-inch" should read 24-inch Signed and sealed this 16th day ofSeptember 1969.

(SEAL) Attest:

Edward M. Fletcher, Jr. WILLIAM E. SCHUYLER, J R.

Attesting Officer Commissioner of Patents

